GNU bug report logs - #21745
25.0.50; emacs infloops after call to vc-annotate

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 21745 in the body.
You can then email your comments to 21745 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Ken Brown <kbrown <at> cornell.edu>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.50; emacs infloops after call to vc-annotate
Date: Fri, 23 Oct 2015 15:14:50 -0400

This bug does not occur in 'emacs -Q' or even 'emacs -q'.  But it does 
occur if I start emacs with no .emacs, no .emacs.d, and no default.el. 
To reproduce:

emacs
C-x d ~/src/emacs/master  [This is my clone of the emacs repo.]
v   [To view .dir-locals.el.]
C-x v g

At this point the cursor is in the annotate buffer (but not blinking), 
and emacs starts using a lot of CPU and is unresponsive.  I assume it is 
inflooping.  If I send the emacs process a SIGUSR2, it is responsive 
again.  At this point I can do 'C-x v g' again with no problem.

A bisection shows that the problem started with the following commit:

commit 1431f667504b610471257802aa2f2f4f0d8443de
Author: Eli Zaretskii <eliz <at> gnu.org>
Date:   Sat Oct 17 15:10:58 2015 +0300

    Avoid crashes when redisplayng a window changes faces or fonts

    * src/xdisp.c (redisplay_internal): If redisplaying the selected
    window or one of the frames turns on the frame's 'redisplay' flag,
    redisplay again.  (Bug#21428)

    * src/frame.c (x_set_font): Set the frame's 'fonts_changed' flag.

In GNU Emacs 25.0.50.48 (x86_64-unknown-cygwin, GTK+ Version 3.14.13)
 of 2015-10-23
Repository revision: 8408f4e38cb4108f8dde971bbc5d5220c66e0f67
Windowing system distributor 'The Cygwin/X Project', version 11.0.11702000
Configured using:
 'configure 'CFLAGS=-g3 -O0''

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GCONF GSETTINGS NOTIFY
ACL GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS
GTK3 X11

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Fundamental

Minor modes in effect:
  diff-auto-refine-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
View mode: type C-h for help, h for commands, q to quit.
Annotating...
Redisplaying annotation...done (Spanned from 2494.8 to 188.8 days old)
Annotating... done
Error during redisplay: (#[128 "\300\301\"\210\300\302\"\207" [apply 
redisplay--pre-redisplay-functions ignore nil] 4 nil nil] nil) signaled 
(quit)
Entering debugger...
Back to top level
Annotating...
Redisplaying annotation...done (Spanned from 2494.8 to 188.8 days old)
Annotating... done

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
help-fns mail-prsvr mail-utils debug help-mode vc-annotate vc
cl-loaddefs pcase cl-lib vc-dispatcher vc-git diff-mode easy-mmode view
dired finder-inf gap-mode-autoloads info muse-autoloads package easymenu
epg-config time-date mule-util tooltip eldoc electric uniquify
ediff-hook vc-hooks lisp-float-type mwheel x-win term/common-win x-dnd
tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment
elisp-mode lisp-mode prog-mode register page menu-bar rfn-eshadow timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
frame cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan
thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian
slovak czech european ethiopic indian cyrillic chinese charscript
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote dbusbind gfilenotify
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 99019 6493)
 (symbols 48 20907 0)
 (miscs 40 124 134)
 (strings 32 19298 4944)
 (string-bytes 1 553817)
 (vectors 16 13331)
 (vector-slots 8 443259 6719)
 (floats 8 187 260)
 (intervals 56 461 21)
 (buffers 976 17))

Message #10 received at 21745 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Ken Brown <kbrown <at> cornell.edu>, 21745 <at> debbugs.gnu.org
Subject: Re: bug#21745: 25.0.50; emacs infloops after call to vc-annotate
Date: Fri, 23 Oct 2015 22:19:53 +0300

On 10/23/2015 10:14 PM, Ken Brown wrote:

> At this point the cursor is in the annotate buffer (but not blinking),
> and emacs starts using a lot of CPU and is unresponsive.

Reproduces here.

Message #13 received at 21745 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Ken Brown <kbrown <at> cornell.edu>
Cc: 21745 <at> debbugs.gnu.org
Subject: Re: bug#21745: 25.0.50; emacs infloops after call to vc-annotate
Date: Fri, 23 Oct 2015 23:08:18 +0300

> From: Ken Brown <kbrown <at> cornell.edu>
> Date: Fri, 23 Oct 2015 15:14:50 -0400
> 
> This bug does not occur in 'emacs -Q' or even 'emacs -q'.  But it does 
> occur if I start emacs with no .emacs, no .emacs.d, and no default.el. 
> To reproduce:
> 
> emacs
> C-x d ~/src/emacs/master  [This is my clone of the emacs repo.]
> v   [To view .dir-locals.el.]
> C-x v g
> 
> At this point the cursor is in the annotate buffer (but not blinking), 
> and emacs starts using a lot of CPU and is unresponsive.  I assume it is 
> inflooping.  If I send the emacs process a SIGUSR2, it is responsive 
> again.  At this point I can do 'C-x v g' again with no problem.

Thanks, I think I fixed this.

Message #18 received at 21745-done <at> debbugs.gnu.org (full text, mbox):

From: Ken Brown <kbrown <at> cornell.edu>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 21745-done <at> debbugs.gnu.org
Subject: Re: bug#21745: 25.0.50; emacs infloops after call to vc-annotate
Date: Fri, 23 Oct 2015 17:36:49 -0400

On 10/23/2015 4:08 PM, Eli Zaretskii wrote:
> Thanks, I think I fixed this.

Confirmed.  Thanks for the quick fix.

Ken

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.